APS meeting in LA

I presented our group’s recent work on the APS March meeting in Los Angeles including

B. Gu, W. Hu, and I. Franco, “Quantifying early-time decoherence dynamics through fluctuations”;

B. Gu and I. Franco, “Partial hydrodynamic representation of quantum molecular dynamics” ;

B. Gu, A. Garzon, I. Franco, “Optical absorption properties of laser-dressed matter”;

R. Carey, L. Chen, B. Gu and I. Franco, “When can time-dependent currents be reproduced by the Landauer steady-state approximation?”. 

Generalized electronic decoherence

We publish a paper to J. Phys. Chem. Lett. that generalizes the theory for the electronic decoherence timescale.  The theory offers a rigorous understanding of early time electronic decoherence and revealed that electronic transitions among diabatic states can play an important role in the decoherence dynamics.

 

A schematic diagram for contributions to electronic decoherence.

 

Quantum decoherence and fluctuations

This is the excerpt for your very first post.

Ignacio Franco and I derive a general but simple formula for decoherence times.  As it demonstrates, the initial purity decay is Gaussian and the associated timescale is determined only by the fluctuations of system and bath operators that enter into the interaction Hamiltonian.  Using this formula, we also showed that mixed quantum-classical methods like Ehrenfest dynamics can capture decoherence correctly provided the initial conditions are sampled from a Wigner distribution.

This paper is published in J. Phys. Chem. Lett., check it out!